A novel method based on cross sensitivity of cataluminescence (CTL) on nano-Ti3CeY2O11 was proposed for simultaneous determination of formaldehyde, benzene and sulfur dioxide in air.The relations between the concentrations of formaldehyde, benzene and sulfur dioxide and their CTL intensities were respectively ascertained at three wavelengths.The accurate concentrations of formaldehyde, benzene and sulfur dioxide can be calculated by superimposed total CTL intensities.The three analysis wavelengths are 420 nm, 535 nm and 680 nm.The surface temperature of the sensitive materials is 280℃.The carrier gas flow rate is 130 mL/min.The detection limits (3σ) are 0.04 mg/m3 for formaldehyde, 0.05 mg/m3 for benzene and 0.10 mg/m3 for sulfur dioxide, respectively.The linear ranges of CTL intensity versus analyte concentration are 0.08-75.60 mg/m3 for formaldehyde, 0.1-101.40 mg/m3 for benzene and 0.3 to 115.00 mg/m3 for sulfur dioxide.The recoveries of 12 testing standard samples by this method are 96.4%-103.7% for formaldehyde, 97.8%-102.5% for benzene and 97.2%-103.3% for sulfur dioxide.Common coexisting substances, such as acetaldehyde, toluene, hydrogen sulfide, ammonia, methanol, ethanol and carbon dioxide, do not disturb the determination.The relative deviation of CTL signals of continuous 200 h detection for gaseous mixture containing formaldehyde, benzene and sulfur dioxide is less than 2%, which shows the longevity of the nanometer composite oxide to formaldehyde, benzene and sulfur dioxide.This method makes full use of the cross sensitive phenomenon, and can realize the on-line analysis of formaldehyde, benzene and sulfur dioxide in air.

Objective To investigate therapeutic effect of the low dose clomiphene treatment of idiopathic oligoasthenospermia and effect on sperm epididymal protein level 4.Methods183 cases of idiopathic oligoasthenospermia were divided into three groups, vitamin group of 61 patients were given vitamin E,clomiphene group(61 cases)treated with low dose clomiphene, combined group of 61 patients were given low dose clomiphene and vitamin E, lasted for 12 weeks.Semen volume, sperm density, sperm motility, sperm survival rate and sperm reactive oxygen species (ROS), malondialdehyde (MDA), superoxide dismutase (SOD), human epididymis protein 4 (HE4), follicle stimulating hormone, luteinizing hormone, testosterone concentration were observed before and after treatment.After treatment, the patients were followed up for 1 year, the observation of the natural pregnancy rate after treatment.ResultsSperm density, sperm survival rate and sperm and a A+B grade sperm in the clomiphene group were significantly higher comparedwith the vitamin group (P< 0.05), sperm density, sperm survival rate and sperm and a A+B grade sperm in the combined group were significantly increasedcompared with clomiphene group and vitamin group (P< 0.05),levels of HE4 after treatment was significantly lower compared with before treatment (P< 0.05), And the difference between the three groups were statistically significant (P< 0.05).Follicle stimulating hormone, luteinizing hormone, testosterone in clomiphene group and combined group after treatment, were significantly increased compared with before treatment (P< 0.05), and the combined group had no statistically difference compared with clomiphene group.The pregnancy rate in 1 year of vitamin group, clomiphene group and combined group were 24.59%, 42.62% and 62.29% (P< 0.05).ConclusionClomiphene treatment of idiopathic asthenospermia is better than vitamin E, the combination of the two has a synergistic effect.

Objective To compare the short-term efficacies of laparoscopic intersphincteric resection (ISR) and laparotomy for ultra-low rectal cancers by Meta-analysis.Methods We searched case-control trials that compared clinical outcomes of laparoscopic ISR and laparotomy from PubMed, EMBase, Ovid, CNKI and Wanfang database.Relevant published and unpublished data and conference papers were also retrieved.Two reviewers independently assessed the qualities of the included studies.Meta-analysis was performed by using of RevMan5.2 software.Results A total of 5 trials with 552 cases were included.The results of Meta-analysis showed that in terms of blood loss of the operation [mean difference (MD) =-65.42, 95％ CI:-93.45--37.38, Z=4.57, P＜0.000 01], flatus passage time (MD=-0.96, 95％CI:-1.45--0.47, Z=3.83, P=0.000 1) and hospital stays (MD=-1.69,95％CI:-2.19--1.19, Z=6.63, P＜0.00001),laparoscopic ISR were significantly superior than those of laparotomy, with significant differences.In terms of operation time (MD =6.61,95 ％ CI:-21.29-34.51, Z =0.46, P =0.64), the positive rate of circumferential resection margin (OR =1.01, 95％ CI: 0.37-2.80, Z =0.02, P =0.98) and postoperative morbidity (0R=0.73, 95％ CI: 0.45-1.20, Z =1.23, P =0.22), there were no significant differences in the two groups.However, laparotomy may clean more numbers of lymph nodes than those of laparoscopic ISR (MD =-1.16, 95％CI:-2.14--0.18, Z =2.31, P =0.02), with significant difference.Conclusion The shortterm efficacy of laparoscopic ISR is superior than that of laparotomy in the treatment of ultra-low rectal cancer.

Objective To investigate the relationship between C-reactive protein (CRP) and carotid intima-media thickness in pa-tients with impaired glucose tolerance (IGT). Methods Senan CRP was measured with immunoturhidimetry and the carotid intima-media thickness (CAIMT) was measured using color Doppler in 108 patients with impaired glucose tolerance (IGT) and 80 subjects with normal glucose tolerance(NGT).Then we observed all IGT patients for 3 years using prospective follow-up method, Oral Glucose tolerance test (OGGT) and every index were measured in follow-up 1.5 year and 3 year. Results 2 objects were lost to follow-up. IGT group showed a significant higher CAIMT and CRP compared with NGT group. After follow-up 1.5 year and 3 year, the patients with impaired glucose toler-ance (IGT) were divided into type 2 diabetes (T2DM) group and IGT group based on the level of blood glucose. Both T2DM group and IGT group showed a significant higher CAIMT and CRP, compared with NGT group. The level of serum CRP of T2DM group was higher than that of IGT group, and the level of serum CRP of IGT group was higher than that of NGT group. There were great differences between each group.Linear correlation showed that the level of blood glucose was positively correlated with CRP and CAIMT in T2DM group after follow-up 3 year. CAIMT was positively correlated with the level of blood glucose and CRP. Mulfivariant stepwise regression showed that CRP was signifi-canfly correlated with the level of blood glucose and CAIMT. Conclusion Inflammation played an important role in the development of dia-betes, and it had great vessels complication. The patients with impaired glucose tolerance, who have high level of CRP, were facilitated to be diabetes, and they were at risk of getting great vessels complication during the phase of impaired glucose tolerance. So it would be helpful to prevent IGT patients with high CRP or CAIMT with anti-inflammatory therapy.

Objective To explore the expressions of growth factor receptor binding protein 2 -associated bin-ding protein -1 (Gab -1 )and glioma -associated oncogene homologue -1 (Gli -1 )in pediatric medulloblastoma,and to analyze their correlation between clinical and pathological characteristics and prognosis in pediatric medulloblastoma. Methods Elivision immunohistochemistry was used to detect the expressions of Gab -1 and Gli -1 protein in tissue microarray of 40 paraffin embedded pediatric medulloblastoma specimens.Chi -square test or Fisher exact test was used to analyze the correlation between Gab -1 and Gli -1 protein expressions with gender,age,tumor location and pathological subtypes.Follow -up data were handled by using Kaplan -Meier survival analysis and Cox regression anal-ysis.Results Positive expression ratios of Gab -1 and Gli -1 protein in 40 pediatric medulloblastoma were 35.0%and 55.0%,respectively.The positive expression rate of Gab -1 in medulloblastoma tissues had no statistical signifi-cance between different genders[male:30.4%(7 /23 cases)vs.female:41 .2%(7 /17 cases)],age[<3 years old:40.0%(6 /15 cases)vs.≥3 years old:32.0%(8 /25 cases)],tumor location[cerebellum:25.0%(5 /20 cases)vs. the fourth ventricle:45.0%(9 /20 cases)]and pathological subtype[classical type:40.7%(11 /27 cases)vs.desmo-plastic /nodular type:50.0%(5 /10 cases)vs.anaplastic /large cell type:66.7%(2 /3 cases)](χ2 =0.496,0.264, 1 .758,3.289,all P >0.05).There were statistical differences of positive expression rate of Gli -1 protein in different age groups[<3 years old:80.0%(12 /15 cases)vs.≥3 years old 40.0%(10 /25 cases)],different pathological sub-types[classical type:40.7%(11 /27 cases)vs.desmoplastic /nodular type:90.0%(9 /10 cases)vs.anaplastic /large cell type:66.7%(2 /3 cases)](χ2 =6.061 ,7.333,all P <0.05 ).There was no statistical difference in positive expression rate of Gli -1 protein between different gender[male:60.9%(14 /23 cases)vs.female:47.1 %(8 /17 cases)]and different tumor location [cerebellum:55.0% (11 /20 cases)vs.the fourth ventricle:55.0% (11 /20 cases)](χ2 =0.753,0.000,all P >0.05).Kaplan -Meier survival analysis showed that the age,the expressions of Gab -1 and Gli -1 protein were correlated with prognosis of pediatric medulloblastoma(all P <0.05).Cox regression indicated that the age,pathological subtypes and the expression of Gli -1 protein were independent prognostic indicators in pediatric medulloblastoma(all P <0.05).Conclusion Expression of Gab -1 and Gli -1 protein is significantly correlated with the prognosis of medulloblastoma,and the positive expression is a marker of unfavorable prognosis.

Objectives To assess the performance of first trimester ultrasound screening for fetal structural and chromosomal anomalies based on a detailed anomaly and nuchal translucency (NT) scan at 11-13+6 weeks' gestation.Methods A prospective cohort study was conducted at Nanjing Drum Tower Hospital.Fetuses with a crown-rump length (CRL) between 45 mm and 84 mm scanned during December 2015 to March 2016 were enrolled in this study.After a detailed first-trimester anomaly scan followed the protocol of systematic standardized scan plans,fetuses with congenital abnormalities were screened out.Second trimester ultrasound screening and postnatal examination were performed for further examination of fetal anomalies.Cytogenetic analysis was performed on the fetuses with informed consent.Results (1) A total of 1 154 fetuses were enrolled in this study and among them,36 (3.1％) cases of fetal abnormalities were diagnosed through prenatal examination (35 cases) and postnatal examination (one case).(2) Twenty-one (58.3％) out of the 36 cases with structural and chromosomal anomalies were screened out by using the first-trimester scan,including eight cases of congenital cardiac defect (two cases of atrioventricular septal defect,one case of tricuspid atresia,one case of tetralogy of tetralogy,one case of right ventricle aneurysms and one cases of hypoplastic left heart syndrome combined with cystic hygroma with one case combined with polydactyly),four cases of central nervous system anomaly (three cases of exencephaly and one case of anencephaly combined with double outlet right ventricle),two cases of cleft palate/lip with one case combined with double outlet right ventricle,two cases of exomphalos,one case of amniotic band syndrome,one case of spinal bifida combined with megacystis,one case of umbilical cyst,one case of polydactyly and one case of cystic hygroma.One case of twin pregnancy chose selective fetocide to the fetus with exencephaly and 16 cases terminated pregnancy.The other four cases were confirmed by second trimester ultrasound screening and postnatal examination.Fourteen (38.9％,14/36) new cases of structural and chromosomal anomalies were detected by the second-trimester scan,six of which terminated the pregnancies and the rest were confirmed at term.One (2.8％,1/36) case of polydactyly was detected postnatally.(3) Chromosomal microarray analysis was performed on 28 cases,seven of which were identified as having chromosomal abnormalities including five cases detected in the first trimester and two cases detected in the second trimester.(4) Out of the 20 fetuses with abnormal NT in early trimester,which accounted for 1.7％ of all enrolled fetuses,nine were indentified with major structural or chromosomal abnormalies,a quarter of all abnormal fetus.Conclusions Detailed anomaly scan and NT scan in the first-trimester can increase the detection rate of fetal structural and chromosomal anomalies as compared with the traditional NT scan and provide earlier detection of severe fetal abnormalities as compared with second trimester anomaly scan.

Objective To study direct economic loss of healthcare-associated infection (HAI)in hospitalized children with acute respiratory infection (ARI),and the influence in satisfaction degree of children’relatives.Methods Clinical data of 1 039 children with ARI in a pediatrics ward between April 1,2012 to March 31,2013 were analyzed retrospective-ly.50 patients with HAI were in case group and 50 patients without HAI were in control group.The difference in medical cost and the degree of satisfaction of children’s relatives were compared between two groups.Results Medical cost of pa-tients in case group was significantly higher than control group([P 25 - P 75 :￥3 095.54 - ￥4 779.48]vs [P 25 -P 75 :￥1 744.14-￥2 382.07],Z =5.89,P <0.01).The expenses in medicine,laboratory examination,diagnosis and treatment,and nursing in case group were all higher than control group,there were significant differences between two groups(all P <0.01 );Hospitalization day of case group was significantly longer than control group ([P 25 -P 75 :9 d-15 d]vs[P 25 -P 75 :6 d-8 d],Z =5.79,P <0.01 ).Satisfaction degree of patients’relatives in case group was significantly lower than control group (Z =8.22,P <0.01).Conclusion HAI occurred in ARI children can increase medical cost,prolong length of hospital stay and decrease satisfaction degree of patients’relatives.

Objective To evaluate the clinical application value of transesophageal atrial pacing (TEAP) combined with atropine load experiment in the diagnosis of the lesions of sinoatrial node and atrioventricular node.Methods One hundred and forty-four cases selected from the outpatient and hospitalized patients in the People's Hospital of Changji Hui Autonomous Prefecture from September 2009 to December 2012,who with dizziness, syncope and other clinical symptoms and electrocardiogram showe.TEAP combined with atropine load experiment were given to these patients.Results (1) The authors detected in all patients,83 cases (57.6％) were positive, among which, 48 cases (57.8％) male, 35 cases (42.2％) female.(2) The authors detected 57 cases(39.6％) non-increased vagus nerve tension cases in 83 positive cases,among which 33 cases (57.9％) male, 24 cases (42.1％) female;Among which 29 cases (20.1％) were sinoatrial node hypofunction, and 16 cases(55.2％) male;8 cases(5.6％) were atrioventricular node hypofunction,and 4 cases(50％) male;14 cases(9.7％) were double node hypofunction, and 10 cases (71.4％) male;6 cases (4.2％) were tachycardia-bradycardia syndrome, and 3 cases (50％) male;among which, a long interval of greater than 3 seconds appeared when we stimulate one 84 years old man with S1S1 stimulate way, immediately pressed protective pacemaker until his own sinus rhythm was restored, as a safety precaution, stoped further examination and classified him as sick sinus group.Conclusion Detect the common causes of slow sinus and atrioventricular block,such as the sinoatrial node dysfunction, atrioventricular node dysfunction, double node dysfunction and increased vagus nerve tension through TEAP combined with atropine load experiment.Consider that this methods have the best diagnostic value in decreasing its rate of false positivity,and should be used as a necessary check before implantation of pacemaker in such patients, suitable used in clinical, especially in basic general hospitals.

Objective To summarize the characteristics of epidemiology,clinic and radiography of mycoplasma pneumoniae pneumonia(MPP) in children.Methods Two hundred and one MPP patients were selected as our subjects who hospitalized in Kailuan General Hospital Affiliated to Hebei United University from Jan.to Dec.2013.All clinical data were recorded.Results Of 412 children with pneumonia,201 children were developed MPP(48.97％).There was significant difference among different age groups regarding of MPP incidence rate(x2 =62.04,P ＜ 0.05),and the highest incidence was in school-age group(71.59％).There was significant difference among the different month,and the MPP cases were more occurred at January,July,September,October and November.The main clinical manifestations were cough (201cases,100％),fever(136 cases,67.66％),moist rales (168 cases,83.58％),breathing (58 casses,28.86％).And parts of children (23.38％) were complicated with extra pulmonary symptoms.The blood WBC of most MPP patients were without obvious increase and blood WBC of 136 cases(67.66％) was less than 10 × 109/L.The cases with hsCRP (＜ 5 mg/L or-10 mg/L) accounted for 36.32％ or 22.39％.Imaging examination results showed that 64 cases were with bronchovascular shadow,73 cases with spot and schistic shadow,64 cases with lobar pneumonia and 3 cases with pleural effusion.Conclusion Clinicians sholud make the early diagnosis and treatment of MPP based on epidemiology,clinical and image comprehensive characteristics of MPP.

Objectives The ferredoxins are iron-sulfur proteins, which function in electron transfer reactions in a variety of systems and participate in the activation of the antimicrobial agent metronidazole. The aim of this study is to clone and characterize ferredoxin genes of Trichomonas vaginalis. Methods A cDNA expression library was constructed with T. Vaginalis total RNA. Hundreds of cDNA clones were isolated and sequenced. Sequence analysis was performed using BLAST programs, ClustalW program, etc. Results One of the cDNA clones, which has homology with T.vaginalis ferredoxin, was further analyzed. This cDNA clone has an open reading frame of 312 base pairs. The deduced precursor protein contains 103 amino acid residues with a hydrogenosome targeting sequence (MLSQCSPLRF) at the N-terminal end. The primary sequence analysis revealed that this new ferredoxin (TvFd2) has a high homology (69% identity) to the previous reported T.vaginalis ferredoxin(TvFd). Interestingly, TvFd2 is homologous to both the two subclasses of (2Fe-2S) ferredoxins, the oxidase ferredoxins and the photosynthetic ferredoxins,but with low similarity. The conserved four-cysteine residues, which are predicted to form the iron-sulfur cluster,are arranged in a typical pattern of (2Fe-2S)ferredoxins(-C-X5-C-X2-C-Xn-C-). Conclusion These data show that TvFd2 is a putative new (2Fe-2S) ferredoxin of T.vaginalis. Its biological function remains to be studied.